Pesticide preparation containing water-soluble filler as well as preparation method and application of pesticide preparation

Abstract

The invention relates to the field of C08L33 / 08, in particular to a pesticide preparation containing water-soluble filler and a preparation method and application thereof.The pesticide preparation at least comprises the following preparation raw materials in percentage by mass: 10-60 wt% of water-soluble filler and 10-60 wt% of pesticide auxiliaries. The type of the pesticide preparation is one of a dispersible oil suspending agent, a suspoemulsion, a suspending agent, granules, wettable powder and water dispersible granules, the water-soluble filler is at least one of urea, water-soluble inorganic salt and maltodextrin, and the urea is adopted to replace the inorganic filler of the pesticide preparation and is matched with other raw materials, so that the pesticide composition is prepared. The invention provides a pesticide preparation meeting the use requirements of flight control, avoids the occurrence of soil hardening phenomenon, increases the fertilizer efficiency of soil, and is beneficial to crop growth.

Description

Technical Field

[0001] The present invention relates to the field of C08L33 / 08, and in particular to a pesticide preparation containing a water-soluble filler, and a preparation method and application thereof. Background Art

[0002] In the field of herbicides, wettable powders have been on the market for many years as a type of formulation. In the era when herbicide research and development technology was relatively backward, wettable powders provided the preparation and production conditions for the insoluble raw materials. Its main technology is to add appropriate amounts of wetting agents, dispersants and inert fillers to the active ingredients, and finally obtain qualified finished products through mixing, air flow crushing and re-mixing. The product wetting time is 80-120 seconds, the suspension rate of the active ingredients is greater than 80%, and it can be used for traditional mechanical spraying.

[0003] In recent years, the aerial spraying technology has developed rapidly, and the spraying of farmland has gradually changed from mechanical spraying to drone spraying. When drones apply pesticides, the concentration of the liquid is high and the amount of water is small. This puts higher requirements on the properties of the product, that is, the product should be wetted quickly in water, the overall suspension rate should be high, and it should not sink to the bottom during the application of pesticides, block the nozzle or unevenly apply pesticides to cause damage. However, the following problems still exist: 1. Conventional wetting agent preparations have a long wetting time, which is easy to cause dust drift, pollute the surrounding environment, and cause pesticide damage to surrounding crops. 2. Traditional dispersants can make the suspension rate of active ingredients reach 85%, but the suspension effect on fillers is poor, which can easily cause filler deposition, block the nozzle and affect application, and make aerial spraying impossible. 3. Inorganic fillers are mostly inert substances and insoluble in water. Dispersants have little effect on them. After they are deposited in water, they have a large viscosity and a bottoming phenomenon, which makes it difficult to apply pesticides and blocks nozzles. At the same time, during the deposition process, some active ingredients are driven to co-deposit, reducing the efficacy or causing local damage. 4. A large amount of inorganic fillers, mostly inorganic salts, are added to the powder. Long-term use can easily cause soil compaction and reduce soil fertility. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a pesticide preparation containing water-soluble fillers. By using urea instead of the inorganic filler in the pesticide preparation and combining it with other raw materials, a pesticide preparation that meets the needs of aerial spraying is provided while avoiding the occurrence of soil compaction, increasing the fertilizer efficiency of the soil, and being beneficial to crop growth.

[0005] On the one hand, the present invention provides a pesticide preparation containing a water-soluble filler, wherein the raw materials for preparing the pesticide preparation at least include: a pesticide technical, a water-soluble filler, and a pesticide adjuvant. Calculated by mass percentage, the content of the water-soluble filler in the pesticide preparation is 10-60wt%, and the type of the pesticide preparation is one of a dispersible oil suspension, a suspoemulsion, a suspension, a granule, a wettable powder, and a water-dispersible granule. The water-soluble filler is at least one of urea, a water-soluble inorganic salt, and maltodextrin.

[0006] As a preferred technical solution, the water-soluble inorganic salt is selected from at least one of ammonium sulfate, sodium chloride, sodium carbonate and sodium bicarbonate.

[0007] As a preferred technical solution, the water-soluble filler is urea.

[0008] As a preferred technical solution, the pesticide adjuvant is at least one of a solvent, a dispersant, an emulsifier, a suspending agent, a wetting agent, an antifreeze agent, a thickener, a stabilizer, a pH regulator, and a structure regulator.

[0009] As a preferred technical solution, the pesticide technical is at least one of a herbicide, an insecticide, and a fungicide. Preferably, the pesticide technical is a herbicide, preferably at least one of triketones, pyrazoles, pyridines, sulfonylureas, sulfonamides, pyridine salicylates, imidazolinones, aromatic oxyphenoxypropionates, phenoxycarboxylic acids, triazines, amides, dinitroanilines, cyclohexenones, substituted ureas, diphenyl ethers, cyclic imides, carbamates, organophosphorus, and bipyridine herbicides. Preferably, the herbicide is an amide herbicide and / or a sulfonylurea herbicide or a sulfonylurea herbicide. Preferably, the amide herbicide is selected from at least one of acetochlor, S-isopropylamine, butachlor and mefenacet; preferably, the sulfonylurea herbicide is selected from at least one of bensulfuron-methyl, bensulfuron-methyl, thifensulfuron-methyl, amidosulfuron-methyl, mesosulfuron-methyl, fluazifop-methyl, iodosulfuron-methyl, nicosulfuron-methyl, foramidosulfuron-methyl, chlorpyrifossulfuron-methyl, bensulfuron-methyl, pyrazosulfuron-methyl, chlorpyrifossulfuron-methyl, monosulfuron-methyl and trifloxysulfuron-methyl.

[0010] Preferably, the pesticide technical is a combination of mefenacet and bensulfuron-methyl, and the contents of mefenacet and bensulfuron-methyl in the pesticide preparation are 20-80wt% and 1-10wt% respectively by mass percentage.

[0011] As a preferred technical solution, the pesticide preparation is a wettable powder. The raw materials for preparing the wettable powder include at least 30-70% of pesticide technical, 5-15% of dispersant, 1-8% of structure regulator, and urea to make up the balance.

[0012] As a preferred technical solution, the raw materials for preparing the wettable powder include at least 40-60wt% of mefenacet, 1-5wt% of benzylsulfuron-methyl, 10-15% of dispersant, 5-8% of structure regulator, and the balance made up of urea, by mass percentage.

[0013] As a preferred technical solution, the dispersant is selected from polycarboxylates and / or lignin sulfonates, preferably polycarboxylates.

[0014] As a preferred technical solution, the structure regulator is selected from at least one of magnesium aluminum silicate, xanthan gum, polymethyl cellulose, fumed silica, and precipitated silica, preferably a combination of magnesium aluminum silicate and silica.

[0015] Preferably, the mass ratio of the magnesium aluminum silicate to white carbon is (1-3):(1-5), preferably (1-3):(3-5), and most preferably 2:4.

[0016] As a preferred technical solution, the particle size of the fumed silica is ≤100 nm, preferably 20-50 nm.

[0017] As a preferred technical solution, the particle size of the magnesium aluminum silicate is 100-1000 mesh, preferably 200-500 mesh.

[0018] In the field of wettable powder formulations, wetting agents generally use K12, sodium dodecylbenzene sulfonate or calcium lignin sulfonate. Such wetting agents have a general wetting effect on the product and can only lock the wetting time of the product between 80-120 seconds, or even more than 120 seconds. Due to the long wetting time, the preparation floats on the water surface, making the product difficult to use. There is a lot of dust during the stirring process, causing environmental pollution and drift damage. The diffusant (dispersant) mainly uses NNO, which has low raw material purity, slow dissolution in water, and insoluble impurities are deposited after dissolution. It has little effect on the suspension of inert fillers, resulting in a large amount of sediment during the application process, which is easy to clog the nozzle and is not suitable for flying spraying. Inert fillers generally use inorganic fillers such as light calcium carbonate and diatomaceous earth. Such fillers are cheap and can meet the low-standard wettable powder index requirements, but such fillers are very easy to deposit and have poor suspension state. Dispersants have little effect on them, and often cause nozzle clogging due to their deposition.

[0019] In this context, the inventors have carried out targeted optimization of the wettable powder formulation system. During the research process, the inventors found that replacing the inert filler in the wettable powder system with a water-soluble filler, especially when the water-soluble filler is urea, can replace the inert inorganic filler to prepare a wettable powder product. When applied, urea can be completely dissolved in the water phase, eliminating the adverse consequences caused by filler deposition, and can also improve the soil. The inventors have explored a large number of water-soluble fillers, but different problems have arisen in the process of preparing wettable powders, including the use of soluble inorganic salt ammonium sulfate. The subsequent thermal storage performance of the product cannot meet the requirements, and the wettable powder product prepared by using soluble maltodextrin has a long wetting time. As the storage time increases, the product will be deposited, and the product will clump after hot storage.

[0020] Furthermore, a large amount of urea is introduced into the system, and the urea content is in the range of 10-60wt%, preferably in the range of 20-40wt%, and the suspension rate and wettability of the product cannot meet the requirements. The present invention introduces 10-15wt% of a polycarboxylate dispersant into the system and adds 5-8wt% of a structure regulator, especially when the structure regulator is a combination of magnesium aluminum silicate and white carbon black, so that the provided product can be uniformly and stably dispersed in the aqueous phase, and the suspension rate of the effective ingredient and the overall suspension rate are both ≥90%. At the same time, the wetting time of the product can be shortened to less than 30 seconds, and rapid wetting can be achieved to prevent environmental pollution and drift damage to surrounding crops caused by floating on the water surface for a long time during the application and preparation process.

[0021] The wettable powder product with a urea content of 20-40% provided by the present invention greatly reduces the difficulty of subsequent pesticide application, does not clog the nozzle during the application process, can meet the requirements of aerial spraying, is more convenient for pesticide application, greatly saves labor, and has high market application and promotion value.

[0022] The wettable powder product provided by the present invention optimizes the product formula system, ensures the field weed control effect of the product, and at the same time, enables the provided wettable powder to have excellent storage stability and heat storage stability, thereby greatly extending the shelf life.

[0023] On the other hand, the present invention provides a method for preparing a pesticide formulation containing a water-soluble filler, which comprises at least the following steps: mixing the pesticide technical, dispersant, structure regulator and urea, and then crushing them, and then mixing them again and discharging them after testing them to be qualified.

[0024] As a preferred technical solution, the preparation method of the wettable powder comprises the following steps: starting the feeding induced draft fan, feeding mefenacet, benzylsulfuron-methyl, dispersant, structure regulator, and urea into a cone mixing kettle through a negative pressure dust removal feeding station, and starting stirring. After stirring for 30-60 minutes, air flow crushing is started, and the crushed material enters a secondary mixing cone mixing kettle through a cyclone separator, and is mixed again for 20-40 minutes and discharged after being tested as qualified to obtain a finished product.

[0025] A third aspect of the present invention provides an application of a pesticide formulation containing a water-soluble filler, which is applied to control grass weeds, broadleaf weeds and sedge weeds in rice fields.

[0026] Beneficial Effects

[0027] 1. The present invention provides a pesticide preparation containing a water-soluble filler. By using urea instead of the inorganic filler of the pesticide preparation and combining it with other raw materials, a pesticide preparation that meets the needs of aerial spraying is provided while avoiding the occurrence of soil compaction, thereby increasing the fertilizer efficiency of the soil and being beneficial to crop growth.

[0028] 2. The present invention replaces the inert filler in the wettable powder system with a water-soluble filler, especially when the water-soluble filler is urea, so as to replace the inert inorganic filler to prepare a wettable powder product. When applied, the urea can be completely dissolved in the water phase, eliminating the adverse consequences caused by the filler deposition, and at the same time can also play a role in improving the soil.

[0029] 3. The present invention introduces 10-15wt% of a polycarboxylate dispersant into the system and adds 5-8wt% of a structure regulator, especially when the structure regulator is a combination of magnesium aluminum silicate and white carbon black, so that the provided product can be evenly and stably dispersed in the water phase, and the effective ingredient suspension rate and the overall suspension rate are both ≥90%. At the same time, the wetting time of the product can be shortened to less than 30 seconds, and rapid wetting can be achieved, thereby preventing environmental pollution and drift damage to surrounding crops caused by long-term floating on the water surface during the application and preparation process.

[0030] 4. The wettable powder product with a urea content of 20-40% provided by the present invention greatly reduces the difficulty of subsequent application of pesticides, will not clog the nozzle during the application process, can meet the requirements of aerial spraying, is more convenient for application, greatly saves labor, and has a high market application and promotion value.

[0031] 5. The wettable powder product provided by the present invention optimizes the product formula system, while ensuring the field weed control effect of the product, so that the provided wettable powder has excellent storage stability and heat storage stability, greatly extending the shelf life.

[0032] 6. The present invention provides a new idea for other pesticide preparations using inert fillers. By optimizing the formulation system and replacing the inert inorganic fillers with highly water-soluble fillers, the preparation of pesticide products of various dosage forms that meet the actual application requirements can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1-6 These are basic index test reports corresponding to Example 1, Comparative Examples 1-4 and Control Examples respectively.

[0034] Figure 7 The graphs are the qualitative test results of the drug solution entering water of the products of Example 1 (right) and the control example (left).

[0035] Figure 8 The results of the stem and leaf spray test 1 are shown in the figure. From left to right, they correspond to the test results of the control example, embodiment 1, and the commercially available product.

[0036] Fig. 9 The results of the coarse drop application test 1 are shown in the figure. From left to right, the test results of the control example, Example 1, and the commercially available product are shown.

[0037] Fig.10 The results of the stem and leaf spray 2 test are shown in the figure. From left to right, they correspond to the test results of the control example, the control example, Example 1, and the product of Example 1.

[0038] Fig.11 The results of the coarse drip spraying test 2 are shown in the figure. From left to right, they correspond to the test results of the control example, the control example, Example 1, and the product of Example 1.

[0039] Fig.12 These are the blank observation results for the field efficacy test on June 5.

[0040] Fig.13 These are the observation results of the control product in the field efficacy test on June 5.

[0041] Fig.14 These are the observation results of the blank product of Example 1 in the field efficacy test on June 5.

[0042] Fig.15 These are the blank observation results for the field efficacy test on June 15.

[0043] Fig.16 These are the observation results of the control product in the field efficacy test on June 15.

[0044] Fig.17 These are the observation results of the product in Example 1 in the field efficacy test on June 15.

[0045] Fig.18 , 19The results are as follows: The results were observed on the 16th day after the control and Example 1 products were applied at multiple doses. DETAILED DESCRIPTION

[0046] Example 1

[0047] Embodiment 1 of the present invention provides a pesticide preparation containing a water-soluble filler, wherein the pesticide preparation is a wettable powder, and its preparation raw materials include, by mass percentage: 50 wt% of mefenacet, 3 wt% of benzylsulfuron-methyl, 11% of a dispersant, 6% of a structure regulator, and the balance made up of urea.

[0048] The mefenacet is derived from Jiangsu Kuaida Agrochemical Co., Ltd., with a content of 97.5 wt %; the benzylsulfuron-methyl is derived from Jiangsu Kuaida Agrochemical Co., Ltd., with a content of 97 wt %.

[0049] The dispersant is polycarboxylate, the trade name is polycarboxylate soluble wetting dispersant, and it comes from Jiangsu Ruibang Agrochemical Co., Ltd.

[0050] The structure regulator is a combination of magnesium aluminum silicate and white carbon black, and the mass ratio of the magnesium aluminum silicate to white carbon black is 2:4.

[0051] The fumed silica comes from Nantong Yelv New Materials Sales Co., Ltd., with a particle size of 20-50 nm; the magnesium aluminum silicate comes from Nanjing Yimeng Biotechnology Co., Ltd., with a particle size of 99.5% through a dry sieve of 200 mesh.

[0052] On the other hand, the present invention provides a method for preparing a pesticide formulation containing a water-soluble filler, comprising the following steps: starting a feeding induced draft fan, feeding mefenacet, benzylsulfuron-methyl, a dispersant, a structure regulator, and urea into a cone-mixed kettle through a negative pressure dust removal feeding station, and starting stirring. After stirring for 40 minutes, air flow crushing is started, and the crushed material enters a secondary mixing cone-mixed kettle through a cyclone separator, and after mixing again for 30 minutes, the material is discharged after being tested as qualified to obtain a finished product.

[0053] Comparative Example 1

[0054] Comparative Example 1 of the present invention provides a wettable powder and a preparation method thereof, and its specific implementation manner is the same as that of Example 1, except that, by mass percentage, its preparation raw materials include: 50wt% of mefenacet, 3wt% of benzylsulfuron-methyl, 11% of dispersant, 2% of fumed silica, and diatomaceous earth making up the balance.

[0055] Comparative Example 2

[0056] Comparative Example 2 of the present invention provides a wettable powder and a preparation method thereof, and its specific implementation mode is the same as that of Example 1, except that, by mass percentage, its preparation raw materials include: 50wt% of mefenacet, 3wt% of benzylsulfuron-methyl, 11% of dispersant, 2% of fumed silica, and the balance is supplemented by light calcium.

[0057] Comparative Example 3

[0058] Comparative Example 3 of the present invention provides a wettable powder and a preparation method thereof, and its specific implementation manner is the same as that of Example 1, except that, by mass percentage, its preparation raw materials include: 50wt% of mefenacet, 3wt% of benzylsulfuron-methyl, 11% of dispersant, 2% of fumed silica, and the balance is made up of maltodextrin.

[0059] Comparative Example 4

[0060] Comparative Example 4 of the present invention provides a wettable powder and a preparation method thereof, and its specific implementation manner is the same as that of Example 1, except that, by mass percentage, its preparation raw materials include: 50wt% of mefenacet, 3wt% of benzylsulfuron-methyl, 11% of dispersant, 2% of fumed silica, and the balance is made up of ammonium sulfate.

[0061] Comparison example

[0062] The control example of the present invention provides a wettable powder and a preparation method thereof, and its specific implementation manner is the same as that of Example 1, except that, by mass percentage, its preparation raw materials include: 50wt% of mefenacet, 3wt% of benzylsulfuron-methyl, 11% of dispersant, 2.13% of white carbon black, 2.93% of lignin, 4% of diatomaceous earth, and the balance is supplemented by light calcium.

[0063] The preparation process of the wettable powder is:

[0064] (1) Feeding process: Open the exhaust system, check whether the valve is opened correctly, put all the raw materials into the coarse mixer, start the coarse mixer, and mix for 20 minutes.

[0065] (2) Processing procedures: Start the exhaust and dust removal system, start the air compressor, run it at no load for 2 minutes, then start the freeze dryer. The air compressor and freeze dryer are running normally. After the air pressure reaches 0.8MPa, open the air inlet valve of the main air pipeline of the air flow mill, open the star-shaped discharge valve of the rough mixer, start feeding the material into the air flow mill and start the crushing process; adjust the pulse air pressure of the dust collector to 0.4Mpa. After the feeding is completed, close the discharge valve of the rough mixer; after the crushing is completed, close the main air pipe valve of the crusher, wait for the compressor to release pressure, turn off the power of the air compressor, and turn off the freeze dryer; then turn off the exhaust and dust removal system induced draft fan, and turn off the frequency converter when the induced draft fan speed drops below half.

[0066] (3) Secondary mixing process: Open the exhaust and dust removal system of the zero-gravity mixer, and put the crushed materials from the silo into the zero-gravity mixer for secondary mixing. The mixture is obtained after mixing for 30 minutes.

[0067] Performance Testing

[0068] 1. Basic indicators: Refer to standard Q / HLN034-2021 to test the appearance, active ingredient content, moisture content, pH value, overall suspension rate, active ingredient suspension rate, wetting time, wet sieving, low temperature stability, and thermal storage stability of the embodiments, comparative examples, and control examples. The test report can be found at Figure 1-6 .

[0069] By analyzing the test results of Example 1, Comparative Examples 1-4 and Control Examples, it can be seen that:

[0070] (1) The wetting time of the product provided in Comparative Example 1 exceeds the range relative to that in Example 1, which seriously affects the preparation of the liquid medicine during use. Although the suspension rate of the active ingredient meets the standard, it is close to the lower limit. During use, it is easy to deposit at the bottom of the medicine tank, causing uneven application of the medicine, resulting in medicine damage or reducing the efficacy of the medicine. At the same time, the sediment is easy to clog the nozzle, affecting the spraying.

[0071] (2) The wetting time of the product provided in Comparative Example 2 is beyond the range relative to that in Example 1, which seriously affects the preparation of the liquid medicine during use. Although the suspension rate of the active ingredient meets the standard, it is close to the lower limit. During use, it is easy to deposit at the bottom of the medicine tank, resulting in uneven application of the medicine, causing medicine damage or reducing the efficacy of the medicine. At the same time, the sediment is easy to clog the nozzle, affecting the spraying.

[0072] (3) Comparative Example 3 Compared with the product provided in Example 1, after using the soluble filler maltodextrin, the wetting time of this formula is still relatively long, which will affect the preparation of the liquid medicine during use. Although the suspension rate of the active ingredient meets the standard, the suspension effect is not as good as urea. If it is not used for a long time during use, it will settle at the bottom of the medicine tank, causing uneven application of the medicine, resulting in drug damage or reduced efficacy. At the same time, the sediment is easy to clog the nozzle and affect the spray. In the subsequent normal storage and heat storage observation, due to the moisture absorption of maltodextrin, the product showed agglomeration, so it is not suitable for use as a filler.

[0073] (4) Comparative Example 4 Compared with the product provided in Example 1, after using the soluble filler ammonium sulfate, the wetting time of this formula is improved, and the suspension rate is also improved compared with other formulas. However, during the subsequent hot storage process, the decomposition rate of the original drug is 8.5%, which is too high and exceeds the standard of 5%. Therefore, it is not listed as a qualified formula.

[0074] (5) Compared with the control example, Example 1 uses urea to replace the inert filler, and with the combined effect of the structure regulator and the wetting agent, the suspension rate of the active ingredient and the overall suspension rate in the product are significantly improved, both reaching more than 90%. And the wetting time is greatly shortened.

[0075] 2. Qualitative test of the state of the drug solution entering water: Take 3 grams of the product of Example 1 and the control example respectively, add them into 100 ml of water, stir them evenly and let them stand for 2 minutes, and observe. The results are shown in Figure 7 The results show that the control example (control example) product has precipitation after 2 minutes, and the precipitation continues to increase. This phenomenon is very easy to block the nozzle during use, especially in aerial spraying. After 2 minutes, no precipitation is produced for the product of Example 1 (improved product), and the product is evenly dispersed in the water phase as a whole, ensuring that the subsequent application of the medicine is uniform, which is conducive to the efficacy of the medicine, does not block the nozzle, and can be used in aerial spraying. In addition, the product of Example 1 has a short wetting time and fast wetting, which prevents dust from floating during the preparation process of the powder and causing pollution and pesticide damage.

[0076] 3. Potted plant experiment

[0077] Test type: Pot test (transparent pots), 3 replicates.

[0078] Test location: Shenyang, Liaoning.

[0079] Pot preparation: Rice seedlings are transplanted when they reach the 3-leaf stage, with 20 rice plants transplanted into each pot, 5 plants in a cluster, for a total of 4 clusters.

[0080] Transplanting time: March 5, 2024.

[0081] Application date: March 11, 2024 (6 days after transplanting).

[0082] Survey date: 7 days after medication (3.18), 12 days after medication (3.23), 21 days after medication (4.1).

[0083] Application method: stem and leaf spray (water consumption 3.5L / mu), coarse drop application (water consumption 3L / mu).

[0084] Spraying equipment

[0085] Stem and leaf spray: electric sprayer, fan nozzle (nozzle model 11001).

[0086] Coarse drop application: syringe.

[0087] Stem and leaf spray 1 test agent and its dosage: 120mL / mu, control example, Example 1, commercially available product (53% benzylpyrimidine. benzothiocyanate wettable powder, Golden Rice), see Figure 8 .

[0088] Coarse drop application test 1: Agent and dosage: 120mL / mu, control example, Example 1, commercially available product (53% benzylpyrimidine. benzothiocyanate wettable powder, Golden Rice), see Fig. 9 .

[0089] Stem and leaf spray 2 test agent and its dosage: 120mL / mu, control example, example 1, see Fig.10 .

[0090] Coarse dripping test 2 agent and dosage: 240mL / mu, control example, Example 1, see Fig.11 .

[0091] Test results: The control example, Example 1, commercially available product leaf spray, and coarse drop application are all safe for rice, but the commercial product inhibits rice growth, and the control example and Example 1 products have basically the same efficacy. When the dosage is doubled, Example 1 and the control example are used alone, and leaf spray and coarse drop application are all safe for rice, without any phytotoxicity or seedling squatting.

[0092] 4. Field efficacy test

[0093] (1) Blank control (observed on June 5): The untreated plots were observed at the same time (six days after application), and weeds (barnyard grass) were particularly abundant and growing vigorously. Fig.12 .

[0094] (2) For the control product, the weed control effect in the field reached the expected level after the 6th day of application with a backpack sprayer (observed on June 5, 120 g / mu), see Fig.13 .

[0095] (3) The product of Example 1 was observed on the 6th day after aerial spraying (observed on June 5, 120g / mu), and achieved the same weed control effect as the control product. Fig.14 , using flying spray, which is convenient for application and saves labor.

[0096] (4) Blank control (observed on June 15): The untreated plots were observed at the same time (16 days after application), and weeds (barnyard grass) were rampant, affecting the normal growth of rice. Fig.15 .

[0097] (5) For the control product, the weed control effect in the field reached the expected level after 16 days of application with a backpack sprayer (observed on June 15, 120 g / mu), and no new weeds appeared. Fig.16 .

[0098] (6) The product of Example 1 was observed on the 16th day after aerial spraying (observed on June 15, 120g / mu), and the weed control effect was the same as that of the control product, and no new weeds appeared. Fig.17 , using flying spray, which is convenient for application and saves labor.

[0099] (7) The control example and Example 1 products were observed on the 16th day after the application of the double dosage (observed on June 15, 240g / mu), see Fig.18 ,19 .

[0100] (8) Conclusion: a. By comparing with the blank experiment, the weeds in the plot without pesticide application were observed on the 6th day after application, and the barnyard grass was seriously damaged. In the plot with pesticide application, according to the normal dosage (120g / mu), both the embodiment and the control example products can achieve good weed control effects on weeds. However, the control example product has a low suspension rate and is easy to clog the nozzle. It can only be sprayed or thrown with a backpack sprayer, which is cumbersome and increases the labor. The embodiment product has not only a high suspension rate of the active ingredient, but also a high overall suspension rate. There is no precipitation phenomenon during the application process, and the nozzle will not be clogged. It can be sprayed with a flying spray, which is more convenient and greatly saves labor.

[0101] b. By comparing with the blank experiment, it was observed on the 16th day after the application of the pesticide that the weeds in the plot without the pesticide grew luxuriantly, and the barnyard grass was very serious. In the plot with the pesticide, according to the normal dosage (120g / mu), the control example and the product of Example 1 can both have a good control effect on the weeds. After a long period of observation, no new weeds appeared. However, the suspension rate of the control example product is low, and the nozzle is easy to be blocked. Only a backpack sprayer can be used for spraying or throwing, and the application of the pesticide is cumbersome and increases the labor. The product of Example 1 not only has a high suspension rate of the active ingredient, but also a high overall suspension rate. There is no precipitation phenomenon during the application of the pesticide, and the nozzle will not be blocked. The spray can be sprayed by flying defense, which is more convenient for application and greatly saves labor.

[0102] c Through the multiple dosage test, when the dosage is increased to 2 times the normal dosage, the product of Example 1 is still safe for rice and does not affect the normal growth of rice. However, the growth of rice seedlings in some parts of the control product is affected. The reason is that the product of Example 1 has a high suspension rate, a good suspension state, and uniform application of the pesticide, which will not cause local damage. However, most of the control examples are thrown and applied, and the product has a low suspension rate, and the sedimentation is fast, which can easily cause uneven application of the pesticide. The local application amount is high, which will cause damage to the rice seedlings and cause local squatting.

Claims

1. A pesticide formulation containing a water-soluble filler, characterized in that: The preparation raw materials at least include: pesticide technical, water-soluble filler, pesticide adjuvant, the content of water-soluble filler in the pesticide preparation is 10-60wt% by mass percentage, the type of the pesticide preparation is one of dispersible oil suspension, suspoemulsion, suspension, granule, wettable powder, water-dispersible granule, and the water-soluble filler is at least one of urea, water-soluble inorganic salt, and maltodextrin.

2. The pesticide formulation containing a water-soluble filler according to claim 1, characterized in that: The water-soluble inorganic salt is selected from at least one of ammonium sulfate, sodium chloride, sodium carbonate and sodium bicarbonate.

3. The pesticide formulation containing a water-soluble filler according to claim 1 or 2, characterized in that: The pesticide adjuvant is at least one of a solvent, a dispersant, an emulsifier, a suspending agent, a wetting agent, an antifreeze agent, a thickener, a stabilizer, a pH regulator, and a structure regulator.

4. The pesticide formulation containing a water-soluble filler according to claim 3, characterized in that: The pesticide raw material is at least one of a herbicide, an insecticide, and a fungicide, and the herbicide is at least one of a triketone, a pyrazole, a pyridine, a sulfonylurea, a sulfonamide, a pyridine salicylic acid, an imidazolinone, an aromatic oxyphenoxypropionate, a phenoxycarboxylic acid, a triazine, an amide, a dinitroaniline, a cyclohexenone, a substituted urea, a diphenyl ether, a cyclic imine, a carbamate, an organophosphorus, and a bipyridine herbicide.

5. The pesticide formulation containing a water-soluble filler according to claim 3, characterized in that: The pesticide preparation is a wettable powder. Calculated by mass percentage, the raw materials for preparing the wettable powder at least include: 30-70% of pesticide original material, 5-15% of dispersant, 1-8% of structure regulator, and urea making up the balance.

6. The pesticide formulation containing a water-soluble filler according to claim 5, characterized in that: The dispersant is selected from polycarboxylates and / or lignin sulfonates, and the structure regulator is selected from at least one of magnesium aluminum silicate, xanthan gum, polymethyl cellulose, fumed silica, and precipitated silica.

7. The pesticide formulation containing a water-soluble filler according to claim 6, characterized in that: The structure regulator is a combination of magnesium aluminum silicate and white carbon black, and the mass ratio of the magnesium aluminum silicate to the white carbon black is (1-3): (1-5).

8. The pesticide formulation containing a water-soluble filler according to claim 7, characterized in that: The particle size of the fumed silica is ≤100 nm, and the particle size of the magnesium aluminum silicate is 100-1000 mesh.

9. A method for preparing a pesticide formulation containing a water-soluble filler according to any one of claims 5 to 8, characterized in that: The method comprises at least the following steps: mixing the pesticide technical, dispersant, structure regulator and urea and then crushing them, and then mixing them again and discharging them after testing and passing the test.

10. Use of a pesticide preparation containing a water-soluble filler according to any one of claims 5 to 8, characterized in that: Used in rice fields to control grass weeds, broadleaf weeds and sedge weeds.

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